panic: uvmspace_fork: no space in map for entry in empty map Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *403613 95769 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 uvm_mapent_clone(ffff800000adba00,e000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000adba00,0,7,fffffd803f012880,20002000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000adba00,0,7,fffffd803f012880,20002000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800015976c38,ffff800014916ee8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000aa1000,ffff800014916ee8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000aa1000,ffff800014916ee8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803dd8b750,c5005601,ffff800000aa1000,1,fffffd803f7c6c60,ffff800014916ee8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8029c800f8,c5005601,ffff800000aa1000,ffff800014916ee8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800014916ee8,ffff8000169865c8,ffff800016986610) at sys_ioctl+0x5b9 syscall(ffff800016986690) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xeb6224172c0, count: 4 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic uvmspace_fork: no space in map for entry in empty map ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 uvm_mapent_clone(ffff800000adba00,e000,1f0000,0,7,7) at uvm_mapent_clone+0x1de sys/uvm/uvm_map.c:3708 uvm_share(ffff800000adba00,0,7,fffffd803f012880,20002000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000adba00,0,7,fffffd803f012880,20002000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800015976c38,ffff800014916ee8) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create(ffff800000aa1000,ffff800014916ee8) at vm_create+0x193 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create(ffff800000aa1000,ffff800014916ee8) at vm_create+0x193 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd803dd8b750,c5005601,ffff800000aa1000,1,fffffd803f7c6c60,ffff800014916ee8) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8029c800f8,c5005601,ffff800000aa1000,ffff800014916ee8) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800014916ee8,ffff8000169865c8,ffff800016986610) at sys_ioctl+0x5b9 syscall(ffff800016986690) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xeb6224172c0, count: -11 ddb> show registers rdi 0xffffffff81664427 db_enter+0x17 rsi 0x21dc __ALIGN_SIZE+0x11dc rbp 0xffff800016985ff0 rbx 0xffff8000169860a0 rdx 0x21dd __ALIGN_SIZE+0x11dd rcx 0xffff800017b45000 rax 0xffff800017b45000 r8 0xffff800016985fb0 r9 0x1 r10 0xffff800000022640 r11 0x2060b389cf5c4d19 r12 0x3000000008 r13 0xffff800016986000 r14 0x100 r15 0x1 rip 0xffffffff81664428 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800016985fe0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=403613 stat=onproc flags process=0 proc=4000000 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800014917160,0xffff800014916028 process=0xffff8000148a30f8 user=0xffff800016981000, vmspace=0xfffffd803f012880 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 95769 254222 79554 0 2 0 syz-executor.1 *95769 403613 79554 0 7 0x4000000 syz-executor.1 75554 204099 89517 0 2 0 syz-executor.0 75554 193534 89517 0 3 0x4000080 fsleep syz-executor.0 75554 316505 89517 0 3 0x4000080 fsleep syz-executor.0 79554 482031 56548 0 3 0x82 nanosleep syz-executor.1 68646 361354 1 0 3 0x100083 ttyin getty 90091 102521 0 0 3 0x14200 bored sosplice 87765 100632 0 0 3 0x14200 acct acct 89517 503860 56548 0 3 0x82 nanosleep syz-executor.0 56548 125023 25451 0 3 0x82 thrsleep syz-fuzzer 56548 508128 25451 0 3 0x4000082 thrsleep syz-fuzzer 56548 415243 25451 0 3 0x4000082 thrsleep syz-fuzzer 56548 23659 25451 0 3 0x4000082 thrsleep syz-fuzzer 56548 511138 25451 0 3 0x4000082 thrsleep syz-fuzzer 56548 188403 25451 0 3 0x4000082 thrsleep syz-fuzzer 56548 189774 25451 0 3 0x4000082 thrsleep syz-fuzzer 56548 51428 25451 0 3 0x4000082 kqread syz-fuzzer 25451 117124 59445 0 3 0x10008a pause ksh 59445 471846 43704 0 3 0x92 select sshd 43704 174331 1 0 3 0x80 select sshd 88116 518233 63619 73 3 0x100090 kqread syslogd 63619 504523 1 0 3 0x100082 netio syslogd 82876 349139 1 77 3 0x100090 poll dhclient 92897 473931 1 0 3 0x80 poll dhclient 43822 207833 0 0 2 0x14200 zerothread 38233 333393 0 0 3 0x14200 aiodoned aiodoned 84720 269912 0 0 3 0x14200 syncer update 33271 103925 0 0 3 0x14200 cleaner cleaner 64165 385232 0 0 3 0x14200 reaper reaper 15466 251504 0 0 3 0x14200 pgdaemon pagedaemon 40331 92498 0 0 3 0x14200 bored crynlk 55926 129291 0 0 3 0x14200 bored crypto 77336 6832 0 0 3 0x40014200 acpi0 acpi0 39836 486684 0 0 3 0x14200 bored softnet 86264 200294 0 0 3 0x14200 bored systqmp 77713 515362 0 0 3 0x14200 bored systq 41274 404576 0 0 3 0x40014200 bored softclock 46427 225613 0 0 3 0x40014200 idle0 39458 383089 0 0 3 0x14200 bored smr 1 4500 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9521 6359K 6924K 78643K 12337 0 0 pcb 13 10K 12K 78643K 157 0 0 rtable 99 7K 8K 78643K 490 0 0 ifaddr 82 14K 16K 78643K 170 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 1 2K 2K 78643K 70 0 0 iov 0 0K 24K 78643K 197 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1220 77K 77K 78643K 1836 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 19 0 0 VM map 5 1K 1K 78643K 11 0 0 sem 12 0K 1K 78643K 176 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 644 0 0 sigio 0 0K 0K 78643K 16 0 0 proc 49 38K 63K 78643K 528 0 0 subproc 32 2K 2K 78643K 85 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 49 0 0 in_multi 74 4K 4K 78643K 135 0 0 ether_multi 1 0K 0K 78643K 2 0 0 mrt 0 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 66 291K 291K 78643K 66 0 0 exec 0 0K 1K 78643K 321 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 119 40K 40K 78643K 2464 0 0 UVM aobj 60 2K 2K 78643K 68 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 134 0 0 NDP 17 0K 0K 78643K 37 0 0 temp 146 3539K 3628K 78643K 26547 0 0 kqueue 0 0K 0K 78643K 11 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 15 0 11 1 0 1 1 0 8 0 rtpcb 80 81 0 79 1 0 1 1 0 8 0 rtentry 112 101 0 66 2 0 2 2 0 8 0 unpcb 120 527 0 519 2 1 1 2 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 79 0 79 2 2 0 1 0 8 0 tcpcb 544 502 0 498 17 16 1 15 0 8 0 ipq 40 10 0 10 4 3 1 1 0 8 1 ipqe 40 450 0 450 4 3 1 1 0 8 1 inpcb 280 2087 0 2079 14 11 3 9 0 8 2 nd6 48 13 0 11 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 ppxss 1128 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 4 0 2 4 2 2 4 0 8 0 art_heap4 256 463 0 284 15 1 14 15 0 8 1 art_table 32 467 0 286 2 0 2 2 0 8 0 art_node 16 98 0 66 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 25 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 174 0 164 1 0 1 1 0 8 0 shmpl 112 66 0 8 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2340 0 946 46 0 46 46 0 8 0 ffsino 240 2340 0 946 83 0 83 83 0 8 0 nchpl 144 3566 0 1966 60 0 60 60 0 8 0 uvmvnodes 72 2847 0 0 52 0 52 52 0 8 0 vnodes 208 2847 0 0 150 0 150 150 0 8 0 namei 1024 10616 0 10616 1 0 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 520 9 0 6 2 1 1 1 0 8 0 scxspl 192 10540 0 10540 10 8 2 7 0 8 2 plimitpl 152 59 0 52 1 0 1 1 0 8 0 sigapl 432 806 0 792 2 0 2 2 0 8 0 futexpl 56 24269 0 24267 1 0 1 1 0 8 0 knotepl 112 425 0 406 3 1 2 2 0 8 1 kqueuepl 104 942 0 940 4 3 1 4 0 8 0 pipepl 128 2704 0 2685 6 2 4 4 0 8 3 fdescpl 424 807 0 792 2 0 2 2 0 8 0 filepl 120 10338 0 10241 16 9 7 12 0 8 3 lockfpl 104 167 0 166 1 0 1 1 0 8 0 lockfspl 48 58 0 57 1 0 1 1 0 8 0 sessionpl 112 21 0 11 1 0 1 1 0 8 0 pgrppl 48 31 0 21 1 0 1 1 0 8 0 ucredpl 96 728 0 721 1 0 1 1 0 8 0 zombiepl 144 792 0 792 1 0 1 1 0 8 1 processpl 864 823 0 792 4 0 4 4 0 8 0 procpl 632 1610 0 1569 4 0 4 4 0 8 0 sosppl 128 16 0 16 3 2 1 1 0 8 1 sockpl 384 2727 0 2709 20 15 5 14 0 8 3 mcl64k 65536 195 0 195 8 5 3 4 0 8 3 mcl16k 16384 8 0 8 4 4 0 1 0 8 0 mcl12k 12288 41 0 41 3 2 1 1 0 8 1 mcl9k 9216 10 0 10 3 2 1 1 0 8 1 mcl8k 8192 58 0 58 2 1 1 1 0 8 1 mcl4k 4096 129 0 129 2 1 1 1 0 8 1 mcl2k2 2112 14 0 14 3 2 1 1 0 8 1 mcl2k 2048 71569 0 71524 14 7 7 13 0 8 0 mtagpl 80 59 0 59 2 1 1 1 0 8 1 mbufpl 256 123326 0 123254 50 30 20 23 0 8 12 bufpl 256 7971 0 3054 308 0 308 308 0 8 0 anonpl 16 101920 0 84747 119 20 99 99 0 62 16 amapchunkpl 152 3742 0 3585 13 5 8 11 0 158 1 amappl16 192 4722 0 3593 88 23 65 69 0 8 8 amappl15 184 16 0 16 1 0 1 1 0 8 1 amappl14 176 65 0 58 1 0 1 1 0 8 0 amappl13 168 296 0 293 1 0 1 1 0 8 0 amappl12 160 10 0 9 2 1 1 1 0 8 0 amappl11 152 60 0 49 1 0 1 1 0 8 0 amappl10 144 155 0 153 1 0 1 1 0 8 0 amappl9 136 609 0 604 1 0 1 1 0 8 0 amappl8 128 194 0 160 2 0 2 2 0 8 0 amappl7 120 191 0 186 1 0 1 1 0 8 0 amappl6 112 70 0 59 1 0 1 1 0 8 0 amappl5 104 168 0 157 1 0 1 1 0 8 0 amappl4 96 1040 0 1011 1 0 1 1 0 8 0 amappl3 88 134 0 128 1 0 1 1 0 8 0 amappl2 80 5803 0 5727 3 1 2 3 0 8 0 amappl1 72 24215 0 23787 27 18 9 20 0 8 0 amappl 80 1889 0 1838 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 67 0 8 1 0 1 1 0 8 0 uaddrrnd 24 816 0 792 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 816 0 792 1 0 1 1 0 8 0 vmmpekpl 168 14088 0 14057 2 0 2 2 0 8 0 vmmpepl 168 104778 0 102464 180 39 141 141 0 357 40 vmsppl 272 806 0 792 2 1 1 2 0 8 0 pdppl 4096 1638 0 1598 7 1 6 6 0 8 1 pvpl 32 284302 0 263996 255 27 228 228 0 265 38 pmappl 200 815 0 798 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 522 0 71 14 0 14 14 0 8 0